Making a disk image backup

Hi,

I'm really happy with the system I have controlling pretty much everything in the house. However because of that I'm worried if the HomeTroller goes wrong I then can't control anything.

I'm looking to buy a backup Gigabyte Brix BXBT-1900 PC but I'm not sure how or even if it's possible to take an image of the disk in the HomeTroll-SEL via a USB stick and then restore it to the Gigabyte (I know there maybe some driver issues there)?

Can anyone help?
thanks